⬆️ Update rand requirement from 0.8 to 0.9 (#721)

Updates the requirements on [rand](https://github.com/rust-random/rand) to permit the latest version.
- [Release notes](https://github.com/rust-random/rand/releases)
- [Changelog](https://github.com/rust-random/rand/blob/master/CHANGELOG.md)
- [Commits](rust-random/rand@0.8.0...0.9.0)

---
updated-dependencies:
- dependency-name: rand
  dependency-type: direct:production
...

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Co-authored-by: dependabot[bot] <49699333+dependabot[bot]@users.noreply.github.com>

rust/ltp/Cargo.toml

@@ -41,7 +41,7 @@ cedarwood = "0.4"
 # 断句避免过多内存申请
 smallvec = { version = "1" }
 # 数据集 shuffle
-rand = { version = "0.8" }
+rand = { version = "0.9" }
 # 特征裁剪
 binary-heap-plus = { version = "0.5" }